在MSCPool特性中，用（）来标示Pool中的每一个MSC。
参考答案：NRI（网络资源标识）
— Could you tell me how to get to the town hall, please?
—__________. Maybe you could ask the policeman over there.
A．A piece of cake
B．That depends
C．I don’t care.
D．I don’t know for sure
计算题：有一矩形无侧收缩自由出流薄堰，已知堰B=0.5米，上、下游堰高P1=P2=0.5米，堰顶水头H=0.2，求通过堰的流量？（已知：M0=0.403+0.053H/P1+0.0007/H）
